Cell selection for uplink transmission

Abstract

Methods and apparatuses for cell selection for uplink transmission. A method for operating a user equipment includes receiving: a bitmap mapping to a number of slots on a primary cell. The mapping repeats periodically over the number of slots. The bitmap indicates the primary cell or a secondary cell. The method further includes receiving information for first parameters associated with transmission of a physical uplink control channel (PUCCH) on the primary cell and information for second parameters associated with transmission of a PUCCH on the secondary cell. The method further includes determining, based on the bitmap, a first cell to transmit a first PUCCH in a slot of the first cell and transmitting the first PUCCH in the slot on the first cell.

What is claimed is: 
     
       1. A method comprising:
 receiving:
 a bitmap mapping to a number of slots on a primary cell, wherein:
 the mapping repeats periodically over the number of slots, and 
 the bitmap indicates the primary cell or a secondary cell, 
 
 information for first parameters associated with transmission of a physical uplink control channel (PUCCH) on the primary cell, and 
 information for second parameters associated with transmission of a PUCCH on the secondary cell; 
 
 determining, based on the bitmap, a first cell to transmit a first PUCCH in a slot of the first cell; and 
 transmitting the first PUCCH in the slot on the first cell. 
 
     
     
       2. The method of  claim 1 , wherein:
 one slot on the primary cell overlaps with more than one slots on the secondary cell, 
 the first cell is the secondary cell, and 
 transmitting the first PUCCH comprises transmitting the first PUCCH on an earliest slot from the more than one slots on the secondary cell. 
 
     
     
       3. The method of  claim 1 , further comprising receiving a downlink control information (DCI) format, wherein the DCI format includes a field with a value indicating a slot on the primary cell for transmission of the first PUCCH. 
     
     
       4. The method of  claim 1 , further comprising:
 determining:
 a first power, based on first power control parameters if the first cell is the primary cell, wherein the first power control parameters are from the first parameters, and 
 a second power, based on second power control parameters, if the first cell is the secondary cell, wherein the second power control parameters are from the second parameters; and 
 
 transmitting the first PUCCH using one of the first power or the second power. 
 
     
     
       5. The method of  claim 1 , further comprising:
 determining, based on the bitmap, a second cell to transmit a second repetition of the first PUCCH, wherein:
 the second cell is the secondary cell, and 
 one slot on the primary cell overlaps with more than one slots on the secondary cell; and 
 
 transmitting the second repetition of the first PUCCH over the more than one slots on the secondary cell. 
 
     
     
       6. The method of  claim 1 , further comprising:
 receiving information for a maximum number of slots on the primary cell for postponing transmission of a second PUCCH; 
 determining:
 that the second PUCCH cannot be transmitted in a slot on a second cell, wherein the slot on the second cell overlaps with a first slot on the primary cell, 
 a third cell, based on the bitmap, to transmit the second PUCCH in a slot on the third cell, wherein the slot on the third cell overlaps with a next slot after the first slot on the primary cell, and 
 that the PUCCH can be transmitted in the slot on the third cell; and 
 
 transmitting the second PUCCH in the slot on the third cell. 
 
     
     
       7. The method of  claim 6 , wherein the second PUCCH includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information associated with semi-persistently scheduled (SPS) receptions of physical downlink shared channels (PDSCHs). 
     
     
       8. A user equipment (UE) comprising:
 a transceiver configured to receive:
 a bitmap mapping to a number of slots on a primary cell, wherein:
 the mapping repeats periodically over the number of slots, and 
 the bitmap indicates the primary cell or a secondary cell, 
 
 information for first parameters associated with transmission of a physical uplink control channel (PUCCH) on the primary cell, and 
 information for second parameters associated with transmission of a PUCCH on the secondary cell; and 
 
 a processor operably coupled to the transceiver, the processor configured to determine, based on the bitmap, a first cell to transmit a first PUCCH in a slot of the first cell, 
 wherein the transceiver is further configured to transmit the first PUCCH in the slot on the first cell. 
 
     
     
       9. The UE of  claim 8 , wherein:
 one slot on the primary cell overlaps with more than one slots on the secondary cell, 
 the first cell is the secondary cell, and 
 the transceiver is configured to transmit the first PUCCH on an earliest slot from the more than one slots on the secondary cell. 
 
     
     
       10. The UE of  claim 8 , wherein the transceiver is further configured to receive a downlink control information (DCI) format, wherein the DCI format includes a field with a value indicating a slot on the primary cell for transmission of the first PUCCH. 
     
     
       11. The UE of  claim 8 , wherein:
 the processor is further configured to determine:
 a first power, based on first power control parameters if the first cell is the primary cell, wherein the first power control parameters are from the first parameters, and 
 a second power, based on second power control parameters, if the first cell is the secondary cell, wherein the second power control parameters are from the second parameters; and 
 
 the transceiver is further configured to transmit the first PUCCH using one of the first power or the second power. 
 
     
     
       12. The UE of  claim 8 , wherein:
 the processor is further configured to determine, based on the bitmap, a second cell to transmit a second repetition of the first PUCCH, wherein:
 the second cell is the secondary cell, and 
 one slot on the primary cell overlaps with more than one slots on the secondary cell; and 
 
 the transceiver is further configured to transmit the second repetition of the first PUCCH over the more than one slots on the secondary cell. 
 
     
     
       13. The UE of  claim 8 , wherein:
 the transceiver is further configured to receive information for a maximum number of slots on the primary cell for postponing transmission of a second PUCCH; 
 the processor is further configured to determine:
 that the second PUCCH cannot be transmitted in a slot on a second cell, wherein the slot on the second cell overlaps with a first slot on the primary cell, 
 a third cell, based on the bitmap, to transmit the second PUCCH in a slot on the third cell, wherein the slot on the third cell overlaps with a next slot after the first slot on the primary cell, and 
 that the PUCCH can be transmitted in the slot on the third cell; and 
 
 the transceiver is further configured to transmit the second PUCCH in the slot on the third cell. 
 
     
     
       14. The UE of  claim 13 , wherein the second PUCCH includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information associated with semi-persistently scheduled (SPS) receptions of physical downlink shared channels (PDSCHs). 
     
     
       15. A base station comprising:
 a transceiver configured to transmit:
 a bitmap mapping to a number of slots on a primary cell, wherein:
 the mapping repeats periodically over the number of slots, and 
 the bitmap indicates the primary cell or a secondary cell, 
 
 information for first parameters associated with transmission of a physical uplink control channel (PUCCH) on the primary cell, and 
 information for second parameters associated with transmission of a PUCCH on the secondary cell; and 
 
 a processor operably coupled to the transceiver, the processor configured to determine, based on the bitmap, a first cell to receive a first PUCCH in a slot of the first cell, 
 wherein the transceiver is further configured to receive the first PUCCH in the slot on the first cell. 
 
     
     
       16. The base station of  claim 15 , wherein:
 one slot on the primary cell overlaps with more than one slots on the secondary cell, 
 the first cell is the secondary cell, and 
 the transceiver is configured to receive the first PUCCH is on an earliest slot from the more than one slots on the secondary cell. 
 
     
     
       17. The base station of  claim 15 , wherein the transceiver is further configured to transmit a downlink control information (DCI) format, wherein the DCI format includes a field with a value indicating a slot on the primary cell for reception of the first PUCCH. 
     
     
       18. The base station of  claim 15 , wherein:
 the processor is further configured to determine, based on the bitmap, a second cell to receive a second repetition of the first PUCCH, wherein:
 the second cell is the secondary cell, and 
 one slot on the primary cell overlaps with more than one slots on the secondary cell; and 
 
 the transceiver is further configured to receive the second repetition of the first PUCCH over the more than one slots on the secondary cell. 
 
     
     
       19. The base station of  claim 15 , wherein:
 the transceiver is further configured to transmit information for a maximum number of slots on the primary cell for postponing transmission of a second PUCCH; 
 the processor is further configured to determine:
 that the second PUCCH cannot be received in a slot on a second cell, wherein the slot on the second cell overlaps with a first slot on the primary cell, 
 a third cell, based on the bitmap, to receive the second PUCCH in a slot on the third cell, wherein the slot on the third cell overlaps with a next slot after the first slot on the primary cell, and 
 that the PUCCH can be received in the slot on the third cell; and 
 
 the transceiver is further configured to receive the second PUCCH in the slot on the third cell. 
 
     
     
       20. The base station of  claim 19 , wherein the second PUCCH includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information associated with semi-persistently scheduled (SPS) transmissions of physical downlink shared channels (PDSCHs).